
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div {

            width: 200px;
            height: 200px;
        }

        .one {
            position: absolute;
            left: 20px;
            top: 50px;

            z-index: 1;

            background-color: pink;
        }

        .two {
            position: absolute;
            left: 50px;
            top: 100px;

            background-color: skyblue;
        }

        /*
            默认情况下, 定位的盒子  后来者居上 ,
            z-index:整数; 取值越大, 显示顺序越靠上, z-index的默认值是0
            注意: z-index必须配合定位才生效
        */
    </style>
</head>
<body>
<div class="one">one</div>
<div class="two">two</div>
</body>
</html>